Friends in this video I will show you how to make Touchless Automatic Musical Doorbell..Proximity Sensor Without Any IC..Simple IR Sensor..Friends it is a very simple circuit project and you can easily make this doorbell at your home..Friend it is a very small musical doorbell but it's sound quality is pretty good and loud..Friends in this circuit we will use a ir transmitter and a ir receiver for detecting obstruction..Friends you can fit this mini automatic doorbell circuit at your front door of your house..When someone will come at your front door the automatic doorbell will be activated and a music will start..Friends in this circuit we will use a UM66 ic for generating a melody..Friend UM66 is a very good musical ic..Friends you can use this louchless automatic doorbell circuit as a home security doorbell..If you will fit this doorbell at your front door then this doorbell will be activated if someone will come near your front door and it will produce a melody and you will realize that someone at your front door..So friends it is a doorbell security system too..Friends you can also call it a proximity sensor or a ir sensor..Friends it is a good science project and you can easily make this simple circuit project at your home..Friends in this video I will show you the complete process of making a touchless automatic musical doorbell or a proximity sensor without using any ic step by step..Friends the automatic doorbell circuit diagram is in the video please see the circuit diagram..So friends if you want to know how to make a touchless automatic musical doorbell or a proximity sensor without using any ic then watch the video and follow my instruction....Thanks..
Doorbell components..
1 piece blank pcb board, 1 piece ir transmitter, 1 piece ir receiver, 1 piece 100ohm resistor, 2 pieces 220ohm resistors, 1 piece 100k preset, 2 pieces BC547 transistors, 1 piece UM66 ic...
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